Diaptomus Westwood, 1836 (additional source)
Diaptomus albuquerquensis Herrick, 1895 accepted as Mastigodiaptomus albuquerquensis (Herrick, 1895) (additional source)
Diaptomus ashlandi Marsh, 1893 accepted as Leptodiaptomus ashlandi (Marsh, 1893) (additional source)
Diaptomus birgei Marsh, 1894 accepted as Onychodiaptomus birgei (Marsh, 1894) (additional source)
Diaptomus caroli Herrick & Turner, 1895 (basis of record)
Diaptomus clavipes Schacht, 1897 accepted as Aglaodiaptomus clavipes (Schacht, 1897) (original description)
Diaptomus eiseni Lilljeborg in Guerne & Richard, 1889 accepted as Hesperodiaptomus eiseni (Lilljeborg in Guerne & Richard, 1889) (additional source)
Diaptomus franciscanus Lilljeborg in Guerne & Richard, 1889 accepted as Hesperodiaptomus franciscanus (Lilljeborg in Guerne & Richard, 1889) (additional source)
Diaptomus leptopus Forbes S.A., 1882 accepted as Aglaodiaptomus leptopus (Forbes S.A., 1882) (additional source)
Diaptomus lintoni Forbes S.A., 1893 accepted as Aglaodiaptomus lintoni (Forbes S.A., 1893) (additional source)
Diaptomus longicornis similis Herrick, 1884 accepted as Diaptomus similis Baird, 1859 accepted as Arctodiaptomus similis (Baird, 1859) (additional source)
Diaptomus minutus Lilljeborg in Guerne & Richard, 1889 accepted as Leptodiaptomus minutus (Lilljeborg in Guerne & Richard, 1889) (additional source)
Diaptomus mississippiensis Marsh, 1894 accepted as Skistodiaptomus mississippiensis (Marsh, 1894) (additional source)
Diaptomus novamexicanus Herrick, 1895 accepted as Leptodiaptomus novamexicanus (Herrick, 1895) (additional source)
Diaptomus oregonensis Lilljeborg in Guerne & Richard, 1889 accepted as Skistodiaptomus oregonensis (Lilljeborg in: Guerne & Richard, 1889) (additional source)
Diaptomus pallidus Herrick, 1879 accepted as Skistodiaptomus pallidus (Herrick, 1879) (additional source)
Diaptomus piscinae Forbes S.A., 1893 accepted as Aglaodiaptomus leptopus (Forbes S.A., 1882) (additional source)
Diaptomus reighardi Marsh, 1895 accepted as Skistodiaptomus reighardi (Marsh, 1895) (additional source)
Diaptomus sanguineus Forbes S.A., 1876 accepted as Onychodiaptomus sanguineus (Forbes S.A., 1876) (additional source)
Diaptomus shoshone Forbes S.A., 1893 accepted as Hesperodiaptomus shoshone (Forbes S.A., 1893) (additional source)
Diaptomus sicilis Forbes S.A., 1882 accepted as Leptodiaptomus sicilis (Forbes S.A., 1882) (additional source)
Diaptomus siciloides Lilljeborg in Guerne & Richard, 1889 accepted as Leptodiaptomus siciloides (Lilljeborg in Guerne & Richard, 1889) (additional source)
Diaptomus signicauda Lilljeborg in Guerne & Richard, 1889 accepted as Leptodiaptomus signicauda (Lilljeborg in Guerne & Richard, 1889) (additional source)
Diaptomus stagnalis Forbes S.A., 1882 accepted as Aglaodiaptomus stagnalis (Forbes S.A., 1882) (additional source)
Diaptomus trybomi Lilljeborg in: Guerne & Richard, 1889 accepted as Diaptomus (Pelorodiaptomus) trybomi Lilljeborg in: Guerne & Richard, 1889 accepted as Leptodiaptomus trybomi (Lilljeborg in: Guerne & Richard, 1889) (additional source)
Diaptomus tyrrelli Poppe, 1888 accepted as Leptodiaptomus tyrrelli (Poppe, 1888) (additional source)